spacum                package:armfot	             	  R Documentation

Function to draw curves of accumulated species
in order to access the length of the sampling 
interval necessary to achieve a stable collector's
curve in camera trap monitoring programs.

Description:

spacum draws a collector's curve for camera trap data.
  

Usage:

    spacum (x)

Arguments:

dados	Data frame consisting of two columns, "date" (containing the
	dates of the capture photographic captures) and "especie" 
	(containing the names of the species captured in each date). 

Details:
	
	The input of "especie" can be in the form of species names or 
	in the form of numbers	assigned to species names. 
     
Value:

  	spacum returns a plot of accumulated species as a function of
	sampling dates. It also writes a table (.csv format) with the
	number of accumulated species as a function of camera
	trap/days.

     

Warning:

    Dates must be in the format "yyyy-mm-dd".

Note:

  	This is version 1.0 of a much more complex function, which I 
	planned to this final exercise and did not function as I 
	intended, but which I will be able to rewrite soon. 


Author(s):

 Beatriz de Mello Beisiegel - CENAP/ICMBio

References:

SILVEIRA, L.F., BEISIEGEL, B.M., CURCIO, F.F., VALDUJO, P.H., DIXO, M., VERDADE, V.K., MATTOX, G.M.T. & CUNNINGHAM, P.T.M. 2010. Para que servem os inventrios de fauna? Estudos Avanados 24:173-207.
SRBEK-ARAUJO, A.C. & CHIARELLO, A.G. 2007. Armadilhas fotogrficas na amostragem de mamferos: consideraes metodolgicas e comparao de equipamentos. Rev. Bras. Zool. 24(3):647-656.
Examples:

#Amostragem curta

especie<- rpois (30, 3)
data = as.Date ("2012-03-01") 
data= seq(from=data, length.out=30, by=1)
dados = data.frame (data, especie)
spacum (dados)

#Amostragem longa
especie<- rpois (240, 8)
data = as.Date ("2012-03-01") 
data= seq(from=data, length.out=240, by=1)
dados=data.frame (data, especie)
spacum (dados)

